Generating Statistics - Oracle Application Server 10.1.3.4 User Manual

Metadata for the IMS/DB Data Source
Table A–8 (Cont.) Columns group Components
Field
Cardinality
Use the Indexes group box to specify cardinality for the columns in each of the indexes
in the table:
Table A–9
Field
Indexes and
segments
Cardinality

Generating Statistics

Click Update in the Statistics tab to generate updated statistics for the table. The
Update Statistics screen is displayed, as shown in the following figure:
Figure A–5 The Update Statistics screen
The following tables list the fields that are used to update statistics:
Use the Type group to specify the following:
A-10 Oracle Application Server Adapters for IMS/DB User's Guide
Description
The number of distinct values for the column. If the value
is -1, then the number of distinct values for the column is
unknown (a value was not supplied and the update
statistics utility was not run to update the value). A value
of 0 indicates that there are no distinct values for the
column.
Indexes group Components
Description
The indexes and segments in the table.
The number of distinct key values in the index. If the value
is -1, then the number of distinct key values in the index
is unknown (a value was not supplied and the update
statistics utility was not run to update the value). A value
of 0 indicates that there are no distinct key values in the
index.